/*
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 * and open the template in the editor.
 */

package homeworkDemo04;

/**
 *
 * @author Administrator
 */
public class CheckPhone {
    public static void main(String[] args) {
        String mobile="1320202020";//假设这是要判断的手机号码
        //设置标签
        boolean flag=true;
        if(mobile.length()!=11){
            flag=false;
            
        }
       
        if (!(mobile.startsWith("13")|| mobile.startsWith("15"))){
    
        flag=false;
        
    }
        String numstr="0123456789";
                for (int i=0;i < mobile.length();i++){
                char c=mobile.charAt(i);
                int temp=numstr.indexOf(c);
                if(temp<0){
                  flag=false;
                  break;
                }
                }
                if(flag)
                {
                    System.out.println(" 是合法的手机号码");

            
      
    }
                
           else

                {
                 System.out.println(" 不是合法的手机号码");   
                }
         }

}
